# physics

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A 770 N man stands in the middle of a frozen pond of radius 9.0 m. He is unable to get to the other side because of a lack of friction between his shoes and the ice. To overcome this difficulty, he throws his 1.2 kg physics textbook horizontally toward the north shore at a speed of 9.0 m/s. How long does it take him to reach the south shore?
s

• physics -

never mind, I figured it out.

• physics -

Good. I answered this one about a week ago. Use momentum conservation to get the speed v after throwing the book. Then use t = d/v
d = 9.0 m

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